The key employee compensation threshold and highly compensated employee threshold numbers both remained the same.

As announced in May 2017, the inflation adjustments for health savings accounts (HSAs) for 2018 were provided by the IRS in Rev. Proc. 2017-37.

Annual contribution limitation.

For calendar year 2018, the limitation on deductions for an individual with self-only coverage under a high deductible health plan is $3,450. For calendar year 2018, the limitation on deductions for an individual with family coverage under a high deductible health plan is $6,900.

High deductible health plan.

For calendar year 2018, a “high deductible health plan” is defined as a health plan with an annual deductible that is not less than$1,350 for self-only coverage or $2,700 for family coverage, and the annual out-of-pocket expenses (deductibles, co-payments, and other amounts, but not premiums) do not exceed $6,650 for self-only coverage or $13,300 for family coverage.[1]

Non-calendar year plans: In cases where the HDHP renewal date is after the beginning of the calendar year, any required changes to the annual deductible or out-of-pocket maximum may be implemented as of the next renewal date. See IRS Notice 2004-50, 2004-33 I.R.B. 196, Q/A-86 (Aug.16, 2004).

Catch-up contribution.

Individuals who are age 55 or older and covered by a qualified high deductible health plan may make additional catch-up contributions each year until they enroll in Medicare. The additional contribution, as outlined in Code 223(b)(3)(B), is $1,000 for 2009 and thereafter.